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The magnetic flux passing perpendicular to the plane of the coil and directed into the paper is varying according to the relation `phi = 3t^(2) + 2t + 3`, where `phi` is in milliweber and t is in second. Then the magnitude of emf induced in the loop when `t = 2` second is-

A

31 mV

B

19 mV

C

14 mV

D

6 mV

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